Liquid treatment apparatus for yarns



Aug. 9, 1949. R. BOUVET 2,478,230

LIQUID TREATMENT APPARATUS FOR YARNS Filed Feb. 17, 1945 INVENTOR.

BY M4 KM Patented Aug. 9, 1949 LIQUID TREATMENT APPARATUS FOR YARNS Rene Bouvet, Drexel Hill, Pa., assignor to American Viscose Corporation, Wilmington, Del., a

corporation of Delaware Application February 17, 1945, Serial No. 578,546

6 Claims.

This invention relates to an improved arrangement for applying sizing compositions to yarns in preparation for weaving and other textile operations.

It is the principal object of the present invention to provide an arrangement using a single set of tangentially related size rolls for the purpose of making a plurality of size applications and alternating squeezings, thereby accomplishing thorough and uniform impregnation of the yarn with the size. Other objects and advantages will be apparent from the drawing and description hereinafter.

In the drawing,

Figure 1 illustrates in end elevation one embodiment of the invention;

Figure 2 similarly illustrates a second embodiment;

Figure 3 similarly illustrates another embodiment; and

Figure 4 illustrates yet another embodiment in end elevation.

As shown in Figure 1, a stack of three tangentially related rolls 2, 3, and 4 are supported on uprights 5 on the framework 6. The axles i of the upper two rolls 3 and 4 are received within slots 8 in the upright 5 so that each of the upper rolls presses against the periphery of the roll immediately therebelow. Thus each upper roll serves as a quetch roll with the roll therebelow as the yarns pass therebetween and the yarns are squeezed by this action. A spray header 9 is provided adjacent the upper quadrant of each of the lower two rolls so that the size may be applied to the yarns carried by the rolls. A baffle Ill defleets any spray into a size trough or receptacle ii. A similar baffle Ma on the other side of the roll 2 is provided for the same purpose. Optionally, however, this baffle may be provided with a doctor-blade l2 of flexible material, such as rubber and the like, so that any size drippings on this side of the roll 2 are removed and flow to the ends of the doctor-blade l2 before flowing into the trough ii. A guiding roll 113 may be provided for controlling the path of the yarn in advance of the first and lowermost roll 2.

As shown in the embodiment of Figure 1, the yarns Y proceed side by side over the rotatable roll l3, under rotatable roll 2, into the nip between rotatable rolls 2 and 3 and then through the nip between rotatable rolls 3 and 4. On the way to the first nip, the warp sheet is sprayed with the sizing medium by the spray head 9 which extends the full width of the warp sheet across the roll 2. Before it passes into the second nip, it is again sprayed with the same sizing medium by the upper spray head 9 disposed on the other side of the roll 3, the spray head again extending the full width of the warp sheet. Excess sizing material fiows down on the yarns about the respective rolls and thus has adequate time for thorough impregnation of the warp sheet prior to entering the next succeeding nip where the sizing material is worked into the sheet uniformly and excess is removed by the squeezing action. While the doctor-blade I2 is not essential, it prevents a substantial amount of the material squeezed from the first nip from coming into contact with the yams before they reach the first spray head 9. This improves somewhat the uniformity with which the first application is made to the yarns or warp sheet.

Figures 2 to 4 show modifications in a diagrammatic manner. In Figure 2, the warp, guided by a roll [3a, proceeds directly to the first nip between the rolls 2 and 3, the roll 2 being immersed in the sizing bath I la. The first application of size therefore occurs just before the first squeezing and the second application of size is made by the spray head 9 adjacent the upper quadrant of the roll 3 which carries the yarns into the nip between rolls 3 and 4. In this embodiment, while the doctor-blade arrangement, such as that of i2 of Figure 1 may be used in conjunction with roll 3, it is preferably omitted so that any residual sizing material carried by roll 3 which in this instance would be relatively uniformly distributed alon the roll comes into contact with the yarn sheet Y as it enters the first nip.

Figure 3 shows an embodiment in which the warp sheet follows the same path about the size roll as in Figure 1 but the lowest roll 2 is partially immersed in the sizing bath i la. Thus, the warp sheet Y passes from the guide roll l3 under roll 2 into the nip between rolls 2 and 3 under the spray head 9 and out between the rolls 3 and Q where final squeezing occurs.

In Figure 4, the arrangement is identical with that of Figure 2 except that an additional spray head Hi is provided for spraying the warp sheet with sizing material immediately in advance of its entering the nip between the rolls 2 and 3.

While the specific illustrations show the rolls vertically super-imposed, they may vary widely from this relationship. Instead of relying upon gravity to press them together to form nips, spring means may be provided to bear against their axles for this purpose. If it is desired to increase the number of liquid applications and squeezes, additional rolls and spray headers may be provided for this purpose and the yarns may proceed in the S-shaped or zigzag path about the additional rolls to direct them past the subsequent spray means and associated nips.

The sizing arrangement in accordance with the present invention yields improved uniformity and thoroughness of impregnation o! the yarns and accomplishes these results without the necessity of using additional sizing rolls, thereby reducing the amount of equipment and space required to a minimum. The invention is applicable to the sizing of yarns of any type whatsoever, such as rayon, synthetic fibers of other types as well as the natural yarns, such as cotton, wool, silk, and the like.

It is to be understood that changes and deviations may be made without departing from the spirit and scope of the invention as defined by the appended claims.

I claim:

1. Yarn sizing apparatus for the application of a liquid medium to yarns comprising a container for receiving a liquid sizing bath, at least three substantially tangentially related superimposed rolls, one of said rolls being disposed intermediate the other two and arranged to form nips between it and the other two rolls, the lowermost only of said rolls being immersed in a liquid-bath, means for guiding yarns from which they pass into the nip between said immersed roll and the intermediate roll and then through the nip between the other roll and the intermediate roll, and spray means for applying a liquid to the yarns as they proceed about the intermediate roll between the two nips.

2. Yarn sizing apparatus for the application of a liquid medium to yarns comprising a container for receiving a liquid sizing bath, at least three substantially tangentially related superimposed rolls, one of said rolls being disposed intermediate the other two and arranged to form.

nips between it and the other two rolls, the lowermost only of said rolls being immersed in a liquid bath, means for guiding yams from which they pass into the nip between said immersed roll and the intermediate roll and then through the nip between the other roll and the intermediate roll, spray means for applying a liquid to the yarns as they proceed about the intermediate roll between the two nips, and spray means for applying a liquid to the yarns in advance of their entering the first nip.

3. Yarn sizing apparatus for the application of a liquid medium to yarns comprising a'container for receiving a liquid sizing bath, at least three substantially tangentially related superimposed rolls disposed above the container, one of said rolls being disposed intermediate the other two and arranged to form nips between it and the other two rolls, means for guiding yarns from which they pass through said nips in succession, and spray means for applying liquid to said yarns in advance of each of said nips.

4. Yarn-sizin apparatus for the application of a liquid medium to yarns comprising a container for receiving a liquid sizing bath, at least three substantially tangentially related superimposed rolls disposed above the container, one of said rolls having its axis at a height between that of .the axes of the other two and being'disposed intermediate the other two and arranged to form nips between it and the other two rolls, guiding means for the yarns from which they pass through the nips in succession so that they proceed about the intermediate roll without losing contact therewith between the nips and means for applying liquid to said yarns in advance of each of said nips.

5. Yarn-sizing apparatus for the application of a liquid medium to yarns comprising a container for a liquid sizing bath, at least three substantially tangentially related superimposed rolls, one of said rolls being disposed intermediate the other two and arranged to form nips between it and the other two rolls, the lowermost onlyof said rolls being partially immersed in the liquid sizing bath in the container, guiding means for the yarns from which they pass through the nips in succession so that they proceed about the intermediate roll without losing contact therewith between the nips, and means adjacent the intermediate roll for applying additional sizing liquid to the yarns as they proceed about the intermediate roll between the nips.

6. Yarn-sizing apparatus for the application of a liquid medium to yarns comprising a container for a liquid sizing bath, at least three substantially tangentially related superimposed rolls, one of said rolls being disposed intermediate the other two and arranged to form nips between it and the other two rolls, the lowermost only of said rolls being partially immersed in the liquid sizing bath in the container, guiding means for the yarns from which they pass through said bath about said immersed roll and through the nips in succession so that they proceed about the intermediate roll without losing contact therewith between the nips, and spray means adjacent the intermediate roll for applying additional sizing liquid to the yarns as they proceed about the intermediate roll between the nips.

RENE BOUVET.

REFERENCES CITED The following references are of record in the file of this patent:

, UNITED STATES PATENTS Number Name Date 189,838 Briggs et al Apr. 24, 1877 413,286 Miller Oct. 22, 1889 628,570 Witham July 11, 1899 1,828,918 Balthasar Oct. 27, 1931 1,984,810 Robertson Dec. 18, 1934 1,997,926 Franks Apr. 16, 1935 2,007,828 Johnson July 9, 1935 2,074,745 Grifiin Mar. 23, 1937 2,155,083 Drewsen Apr. 18, 1939 2,291,616 Fletcher Aug. 4, 1942 2,369,450 Fisher et al. Feb. 13, 1945 2,402,653 Clark June 25, 1948 FOREIGN PATENTS Number Country Date 2,503 Germany Feb. 1, 1878 43,606 France July 19, 1934 

